SP1648 Datasheet | Zarlink Semiconductor Inc

Obsolescence Notice This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink./obsolete_products/ JULY 1994 3028-2.1 ECL OSCILLATOR The SP1648 is an emitter-coupled oscillator, constructed on a single monolithic silicon chip. Output levels are patible with ECL III logic levels. The oscillator requires an external parallel tank circuit consisting of an inductor (L) and capacitor (C). A varactor diode may be incorporated into the tank circuit to provide a voltage variable input for the oscillator (VCO). The device may also be used in phase locked loops and many other applications requiring a fixed or variable frequency clock source of high spectral purity. The SP1648 may be operated from a +5.0V dc supply or a -5.2V dc supply, depending upon system requirements. TANK V CC 2 V CC 1 OUTPUT 1 2 3 4 8 7 6 5 BIAS POINT V EE 2 V EE 1 AGC Operating temperature range: 0°C to +75°C (Plastic) Supply voltage +5.0V dc -5.2V dc GND PINS 6,7 2,3 SUPPLY PINS 2,3 6,7 MP8 Fig.1 Pin connections (not to scale) - top view ORDERING INFORMATION SP1648 MP (Industrial - Miniature Plastic Package) ABSOLUTE MAXIMUM RATINGS Power supply voltage VCC - VEE +8.0V Output source current<40m A AGC input VCC to VEE Storage temperature range-55°C to +150°C (Plastic) Operating junction temperature MP<150°C ELECTRICAL CHARACTERISTICS TEST VOLTAGE/CURRENT Volts Test temp. VIH Max. +1.960 +1.800 +1.680 VIL Min. +1.410 +1.300 +1.180 VCC 5.0 5.0 5.0 m Adc IL 5.0 5.0 5.0 VEE (Gnd) Supply Voltage: +5.0V SP1648 Test Limits Pin under test -30°C Min. Max. Min. +25°C Max. Min. +85°C -30°C +25°C +85°C Characteristic Symbol Unit Max. TEST VOLTAGE/CURRENT APPLIED TO PINS LISTED BELOW VIH Max. VIL Max. 1 VCC 2,3 2,3 2,3 2,3 IL 3 3 - Power supply drain current Logic ‘1’ output voltage Logic’0’ output voltage Bias voltage IE VOH VOL...